OHLER Circular Cold Sawing Machines

Circular cold sawing machines from OHLER have a long-standing tradition. Their typical design features are proven, and have therefore remained characteristic traits until today. Even with increased demands regarding the materials to be cut; advances in cutting parameters and saw blades developments, OHLER circular cold sawing machines are able to perform and are built with old school integrity.

Advantages of OHLER Circular cold sawing machines

Closed system

The frame of the machine is comprised of a stable base made of cast iron, two columns with a cross bar and the carriage which runs vertically between the cylindrical column guides. Saw blade and feed cylinder are thereby precisely in the center level of the machine. All cutting forces act against the fixed clamping spindle side, and are dispersed within the closed system.

Vibration damping

The heavy machine body made of cast iron also absorbs vibrations, just like the amply dimensioned helical bevel gearbox in combination with a worm gear.

Carriage guide

The cutting forces are absorbed by exceptionally large-surfaced carriage guides. During the sawing, they absorb the horizontally acting partial forces of the cutting pressure; the vertical cutting pressure is generated by two synchronized hydraulic cylinders which compensate the weight of the saw carriage. This ensures an extremely long service life of the guides.

Workpiece clamping

A centric material clamping ensures the shortest possible cutting paths and saw times. The in-feed and discharge clamping of the workpieces in conjunction with robust vertical guidance of the saw carriage produces low-ridges and rectangular sections

Cutting performance

Very high cutting performances can be achieved through the use of LENNARTZ carbide-tipped circular saw blades. Material up to a tensile strength of 1500 N/mm² can be cut.

Combination-machine HSS/HM

Depending on the requirements, the OHLER circular cold saw machine offers the unique option to utilize carbide-tipped circular saw blades and segmental circular saw blades. The machine can provide a high torque even at low cutting speeds through the 6-speed manual transmission and the resulting possible gear ratios. Through the use of a frequency inverter, it is possible to attain all possible cutting speeds between the transmission steps.

Designs of OHLER circular cold sawing machines

Build size 630

K-630 NIRO

K-630 HSS

K-630 KOMBI

K-630 HM

K-630 S

Power [kW]

7.5

7.5

15

22.5

22.5

Switching transmission

6 level

4 step

Cutting speeds with a saw blade diameter of 630mm [m/min]

4 / 6 / 9 /12 / 16 / 23

6 / 9 / 13 /18 / 25 / 34

20 / 27 / 39 /55 / 75 / 104

30 / 41 / 59 /82 / 113 / 156

78 / 108 / 158 / 219

Cutting speeds with a saw blade diameter of 630mm with a controlled frequency inverter [m/min]

3 - 37

4 - 54

12 - 166

18 - 250

47 - 350

Saw blade diameter [mm]

500 - 710

500 - 710

500 - 710

500 - 710

500 - 710

max. workpiece dimensions

round [mm]

250

250

220

220

220

square [mm] [mm]

240

240

210

210

210

Dimension and weight

Length x width x height [mm]

860 x 1560 x 2140

860 x 1560 x 2140

860 x 1560 x 2140

860 x 1560 x 2140

860 x 1560 x 2140

Weight [kg]

3300

3300

3500

3500

3500

Build size 1000

K-1000 NIRO

K-1000 HSS

K-1000 KOMBI

K-1000 HM

K-1000 S

Power [kW]

11

15

37

37

37

Switching transmission

6 level

Cutting speeds with a saw blade diameter of 1000mm [m/min]

4 / 6 / 8 /11 / 14 / 21

6 / 9 / 13 /16 / 22 / 32

20 / 27 / 39 /51 / 69 / 100

25 / 34 / 49 /63 / 85 / 123

60 / 81 / 117 / 151 / 205 / 296

Cutting speeds with a saw blade diameter of 1000mm with a controlled frequency inverter [m/min]

3 - 34

4 - 51

12 - 160

15 - 196

36 - 474

Saw blade diameter [mm]

800 - 1120

800 - 1120

800 - 1120 (1150)

800 - 1150

800 - 1120 (1150)

max. workpiece dimensions

round [mm]

400

400

350

350

350

square [mm] [mm]

385

385

330

330

330

Dimension and weight

Length x width x height [mm]

1260 x 2060 x 2705

1260 x 2060 x 2705

1260 x 2060 x 2805

1260 x 2060 x 2805

1260 x 2060 x 2805

Weight [kg]

6700

6700

7000

7000

7000

Conversion of the OHLER segmenteal circular sawing machines for use of carbide-tipped circular saw blades

The conversion is performed while maintaining the machine housing and the large-scale column guides, and thus also ensures the decisive advantages of the OHLER cold circular saw machine for the utilization with carbide-tipped tools.

Such a modification essentially consists of:

An increase of the drive performance, while maintaining the input speed at the gearbox.

Increase of the output speed of the saw shaft through an alteration of the reduction ratio in the gearbox.

Installation of a frequency converter for the variable pre-selection of the required cutting speed between the six transmission switching steps.

Attachment of vibration damping elements, as well as cooling, lubrication and chip removal systems.

Adjustment of the machine hydraulics to the requirements.

Expansion of the work-piece clamping for a cutting gap widening to protect the blades during the saw blade return.

Installation of a PLC controller (Siemens S7).

A tool breakage monitoring can be adapted.

Last but not least, this modification provides a significant price advantage compared to the new purchase of a machine with an absolutely comparable cutting performance.